[In-depth] Differences Between Vacuum tube and Transistor 2023 - 技术资讯 | 越讯源电子网
[In-depth] Differences Between Vacuum tube and Transistor 2023 - 技术资讯 | 越讯源电子网
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Guide for Variable Resistor 2023
Variable Resistor are mainly two types of trimmer and potentiometer, whose most important feature is that the resistance value can be continuously adjustable within a certain range. (1) Trimmer Resistors Trimmer resistors are also known as trimmer potentiometers and semi-adjustable resistors, whose shape can be seen in the figure below. Its resistance value can be changed within a certain range, and is often used in circuits that occasionally need to adjust the resistance value, for example, as a bias resistor for transistors, bridge balancing resistors, etc. The structure principle of trimming resistors can be illustrated by the WH7-A type vertical trimming resistor shown below. Compared with the fixed resistor, the trimmer resistor has an additional contact pin that slides between the two fixed resistor tab pins, where the resistance value between the two fixed resistor tab pins is fixed, and the resistance value is called the nominal resistance value of this trimmer ...
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